M46.85

Billable

Other specified inflammatory spondylopathies, thoracolumbar region

HCC Category Mapping

V24HCC 40 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease

0.307

ESRDHCC 40 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease

0.000

What This Code Means

Inflammation of the spine where the mid-back and lower back meet (thoracolumbar region) that doesn't fit into other specific categories.

Coding Tips

•This code applies to the junction between thoracic and lumbar spine; verify documentation specifies this transitional area
•Distinguish from codes for purely thoracic or purely lumbar involvement

Clinical Significance

Inflammatory conditions at the thoracolumbar junction present unique challenges due to the biomechanical stress at this spinal transition zone. These chronic inflammatory conditions often require prolonged anti-inflammatory therapy and careful monitoring for structural complications.

Documentation Requirements

✓Thoracolumbar junction involvement (T12-L1)
✓Non-infectious inflammatory process
✓Imaging of transitional zone inflammation
✓Assessment of spinal alignment at junction
✓Inflammatory laboratory monitoring
✓Response to anti-inflammatory medications
✓Functional assessment of transitional zone
✓Long-term structural integrity evaluation

Commonly Confused Codes

M46.55 — Infective spondylopathy same region when infectious M46.84 — Thoracic region when limited to thoracic levels M46.86 — Lumbar region when limited to lumbar levels M43.27 — Fusion of spine when describing treatment outcome

Code Hierarchy

└M46Other inflammatory spondylopathies └M46.8Other specified inflammatory spondylopathies └M46.85Other specified inflammatory spondylopathies, thoracolumbar region

└M46.85Other specified inflammatory spondylopathies, thoracolumbar region